Bar supporting and spacing device



Oct- 6, 1925- 1,556,! 78 Y O. T ALLAKSEN BM SUPPORTING AND SPACING DEVICE Filed Fab. 9, 1923 ji -Legs, 12%;

Patented Oct. 6, 1925.

UNITED STATES OLAF 'rALLAKsnN, OF CHICAGO, 'ILLrNor-s.

BAR SUPPORTING AND SIACING DEVICE.

Application filed. February 9,1921% Serial No. 618,113.

To all whom it may concern:

Be it known that I, OLAr TALLAKSEN, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented anew and useful Improvement in Bar Supporting and Spacing Devices, of which the following is a specification.

This invention relates to metal reinforcements for concrete made up of a fabricated series of substantially parallelly arranged elements, to which bars are transversely secured in a predetermined spaced relation to each other.

The main objects of this invention are to provide an improved construction and arrangement of means for holding and spacing the reinforcing bars on said fabricated elements; to provide improved bar holding and spacing means which permits the insertion of the reinforcing bars after the fabricated elements have been setv in place; to

provide improved means of this kind which is adapted to be manufactured separate from and afterwards readily attached to said fabricated elements; and toprovide means of this kind which is simple in construction, inexpensive to manufacture, and convenient to use. a

An illustrative embodiment of this invention is shown in the accompanying drawing, in which:

Figure 1 shows a section of an improved bar spacing and fastening member constructed in accordance with this invention.

Fig. 2 is a vertical section of a fabricated spiral reinforcement for concrete columns to which this invention is applied for the pur pose of holding in place the vertical reinforcing bars.

Fig. 3 is a transverse view of the same taken on the line 3-3 of Fig. 2, the mold form and the parts below said line being omitted for the sake of clarity.

Fig. 4 is an enlarged elevational view of one convolution of the spiral upon which has been secured the improved bar spacing and supporting member.

The formation of reinforcements, and particularly column reinforcements, comprising a vertically arranged spiral to which axially disposed reinforcing bars are secured, is a well-known means of reinforcing concrete, generally in structures which do not make use of fabricated structural steel. Heretofore these reinforcements have been made up by lation, on the floor in a horizontal position, and then tying the axially disposed bars in place, after which thecompletely fabricated reinforcement'was set up in place. This usually required the use of a derrick. By the use of this invention the fabricated spiral by itself may be set up and then have the axially disposed bars set in place one at a time. This dispenses with the use of a derrick.

A structure embodying this invention involves the use of a strip bent to form loops along the length thereof, two or more of laying the spiral, with the convolutions secured in their definite spaced rewhich strips are adapted to be perimetrically 7 arranged on. the partially completed reinforcement so as to provide spaced alined openings into which the reinforcing bars can be inserted and be held in properly spaced relation with respect to the remainder of the reinforcement.

In the specific embodiment herein shown, the improved bar supporting and spacing member comprises a strip of wire 1, bent to form U-shaped loops 2 at uniform intervals therealong. Such a strip is made up either in sections of a predetermined length, or in a coil from which sections of the desired length can be severed. Sections of this looped strip are intended to be laid around the partially formed reinforcement at intervals therealong so that the loops 2 extend inwardly and provide spaced alined openings throughwhich the transverse reinforcing bars 4 can be inserted.

The use of this invention is herein specifically illustrated in connection with a spiral reinforcement 5, such as is used for forming concrete columns. The spiral reinforcement 5 has the convolutions thereof definitely spaced apart by means of notched members 6 to which the spiral reinforcement is secured at intervals along the length of said members by means of wires twisted around the convolutions of the spiral and said member. Adjacent each end of the.

rough which the vertical reinforcing bars may be inserted andheld in definitely spaced relation on the spiral pending the pouring of the concrete.

By using a spacing and fastening device of this kind, it is possible-to fir two or more of these looped wires on the spiral 5 and then set the spiral in place. The placing of the spiral can be accomplished by hand, which means a saving of time, labor. and equipment. After being set in place the vertical reinforcing bars 4 may then be inserted from above, one at a time, and passed through the alined openings formed by the loops 2.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted Without departing from the spirit of this invention as defined by the following claims.

I claim:

1. A spacing and fastening device for concrete reinforcements comprising a wire having; U-shaped loops formed therein at inter vals th-erealong, said Wire being spirally wrapped around the perimeter of a partially fabricated reinforcement with the loops extending inwardly therefrom to provide openings adapted to receive, and hold in place, transversely disposed bars.

2. A reinforcement for concrete comprising a fabricated spiral element, wires bent to form loops secured to certain of the spiral convolutions with the loops extending in- -wardly of the respective convolution so as to provide axially alined openings, and bars secured to said fabricated spiral, in axial relation. by being inserted through said openings.

3. A reinforcement for concrete comprising a fabricated spiral element, wires bent to form loops secured to certain of the spiral convolutions with the loops of the Wires alternately arranged on opposite sides of the respective convolution of said element and with the loops extending inwardly of the respective convolution so as to provide axially alined openings, and bars secured to said fabricated spiral, in axial relation, by being inserted through said openings.

Signed at Chicago this 5 day of Feb. 1923.

OLAF TALLAKSEN.

reinforcing u 

